Cattle (as well as all other animals and people) should be kept out of the area during application of
Crossbow Specialty Herbicide - 2, 4-D & Triclopyr is not labeled for grassy weeds like Johnsongrass, but for brushy type weeds. We would recommend using a product like
Crossbow Specialty Herbicide is labeled for creeping charlie aka ground ivy when used as directed on the
Tree of Heaven is an invasive species that can require chemical and cultural methods to control completely. You will probably need to cut a treat the stumps directly with a product like Crossbow Specialty Herbicide for best results. This article from the PennState Extension service has more information about this difficult tree.
Control of Brazilian Pepper Tree can be tricky, and which herbicide is best will depend on the time of year and method that you are using. Something like Rodeo Herbicide (glyphosate) will likely only work on seedlings, and may take several weeks to kill the young plants. Crossbow Specialty Herbicide can be used for basal bark treatments in general, however the product label does not specifically list Brazilian pepper tree as a plant that it controls. This article from your Florida
In order to kill a tree that size, you would get the best results cutting the tree down to a stump and treating the fresh cut stump directly. If the trunk diameter is less than 6-8 inches, then you could potentially do a basal bark treatment with Crossbow Specialty Herbicide.